n, m = map(int,input().split())
primary, annex = {}, {}
for i in range(1,m+1):
    x, y, z = map(int, input().split())
    if z==0:
        primary[i] = [x, y]
    else:
        if z in annex:
            annex[z].append([x, y])
        else:
            annex[z] = [[x,y]]
dp = [0]*(n+1)
for key in primary:
    w, v= [], []
    w.append(primary[key][0]) #1、主件
    v.append(primary[key][0]*primary[key][1])
    if key in annex:#存在附件
        w.append(w[0]+annex[key][0][0])#2、主件+附件1
        v.append(v[0]+annex[key][0][0]*annex[key][0][1])
        if len(annex[key])>1:#附件个数为2
            w.append(w[0]+annex[key][1][0])#3、主件+附件2
            v.append(v[0]+annex[key][1][0]*annex[key][1][1])
            w.append(w[0]+annex[key][0][0]+annex[key][1][0])#4、主件+附件1+附件2
            v.append(v[0]+annex[key][0][0]*annex[key][0][1]+annex[key][1][0]*annex[key][1][1])
    for j in range(n,-1,-10):#物品的价格是10的整数倍
        for k in range(len(w)):
            if j-w[k]>=0:
                dp[j] = max(dp[j], dp[j-w[k]]+v[k])    
print(dp[n])